I never took anyone with me to any appointment. I just took a LOT of notes in a little pad that was always with me, no matter where I happened to be. That way I could write down questions as soon as I thought of them (before I had a smart phone )
I think most people do have someone to go with them, but I've had to cope with so much in my life, that I had no issue going by myself. But that's just me.
Please try and talk to your husband and let him know how you feel. Maybe he could agree to go to this one and skip the others.